Folding machine



June 16, 1936. w. E. NAUGLER FOLDING MACHINE Filed Aug. 17, 1952 8 Sheets-Sheet l w Qwww I 1 June 16, 1936; w. E. NAUGLER 2,044,097

FOLDING MACHINE Filed Aug. 1'7, 1952 8 Sheets-Sheet 2' June 16, 1936. w E, NAUGLER 2,044,097

FOLDING MACHINE Filed Aug. 17, 1932 8 Sheets-Sheet 3 f3] iOf 1,

June 16, 1936. w. E. NAUGLER 2,044,097

FOLDING MACHINE Filed Aug. 17, 1952 8 Sheets-Sheet 4 221 Mg /Wm 4 W v M 32% FOLDING MACHINE Filed Aug. 17, 1932 8 Sheets-Sheet 5 June 16, 1936. w. E. NAUGLER FOLDING MACHINE Filed Aug 17, 1952 8 Sheets-Sheet 6 /NVENT[7R MZ June 16, 1936. w. E. NAUGLER FOLDING MACHINE Filed Aug. 17, 1932 8 Sheets-Sheet 7 June 16, 1936. w NAUGLER 2,044,097

FOLDING MACHINE 2W Wm/ma 605 P T s Z/ZZZZ;

445 j Tig.2l. $1 122.

Patented June 16, 1936 PATENT OFFICE 2,044,097 FOLDING MACHINE Walter E. Naugler, Beverly, Mass, assi'gnor to United Shoe Machinery Corporation, Paterson, N. J a corporation of New Jersey Application August 17, 1932, Serial No. 629,181

'71 Claims.

t is customary in the manufacture of shoes to cement the margins of certain parts of the uppers and then to fold these margins so as to produce edges of pleasing appearance in the finished shoes. Hitherto machines for performing'this and similar operations have commonly fed the work intermittently, the fold being formed preparatory to being pressed by a folder of some kind which operates during the pauses in the intermittent feed movements of the Work.

With a view to speeding up the operation of folding machines and at the same time of improving the character of the output, there is provided, according to one feature of the invention, means for feeding the work continuously and a folder which is moved in a path at an angle to the direction of feed movement of the work to form the fold. In the illustrated. machine the work is fed continuously by mechanism including two feed members which engage the work in turn one after the other. The folder moves back and forth in the line of feed, and during its forward movement also moves transversely of the line of feed to form afold in the moving work.

According to another feature of the invention, one of the feed members engages the margin of the work, which has been operated upon by the folder, to press or hammer the fold and thus acts as a fold-presser or hammer in addition to its feeding function. In the illustrated machine, one of the feed members engages the body portion of the work adjacent to the folder and cooperates with the folder to form the fold, the other feed member having a work-engaging face which is brought down upon the fold to press it.

In machines which employ a creaser or foldguide, it is desirable to cause the margin of the work to be drawn tightly about and pressed against the edge of the creaser. According to another feature of the invention, there is provided a folder mounted for movement upon a member which is itself moved in a predetermined path during the movement of the folder with respect to it to accomplish the desired result. In the i1- lustrated construction, the folder is mounted for swinging movement upon a carrier which is moved up and down during the swinging movement of the folder to cause the axis about which the folder swings to move in a predetermined path, whereby an exceedingly elfective movementof the folder results;

These and other features of the invention including certain details of construction and combinations of parts will be describedasembodied in an illustrated machine and pointed out in the appended claims.

Referring now to the accompanying drawings,

Fig. l is a front elevation of a machine in which the present invention is embodied, 5

Fig. 2 is a front elevation of a portion of the machine, the work-supporting table and the housing for the mechanism at the outer end of the lower arm, both having been removed,

Fig. 3 is an end elevation of the parts shown in Fig. 2, the cover plate at the outer end of the upper overhanging arm having been removed,

Fig. 4 is a section on the line IV-IV of Fig. 2,

Fig. 5 isa plan of the work-engaging parts showing a piece or work in process of being operated upon,

Fig. 6 is a perspective of the mechanism for op: erating the fold-presser carrier and for vibrating the knife, certain parts having been shown in separated relation,

Fig; 6a is a detail of the mounting of the finger which cooperates with the gage,

Fig. 7 is a perspective showing principally the mounting of the creaser,

Fig. 8 is a perspective of the mechanism for operating the creaser carrier, which carries not only the creaser but the knife, the gage and the finger which cooperates with the gage, some of said parts having beenshown in separated relation,

Fig. 9 is a detail prin'cipallyin plan showing the mountingof the knife,

Fig. 10 is a detail in perspective of one of the parts of the mechanism which operates the foldpresser carrier,

Fig. 11 is a perspective of the mechanism for operating the feed-block-carrier,

Fig.1l2 is a perspective of the mechanism for operating the anvil carrier,

' Fig. 13 is a perspective of the mechanism for adjusting-certain parts of the machine so as to vary-the'rate of feed of the-work,

Fig. 14 15 a perspective'of the mechanism for operating the folder,

Fig. 15 is a section on the line'XV-XV of Fig. l,

Fig. 16 is a perspective of one-member of the folder-operating mechanism.

Fig. .17 is a view principally in elevationshowin'gthe mounting of the folder,

Figs. 18, 19 and 20 are details in elevation showing. successivef positions occupied by the folder, and

' Figs. 21 and 22 -are diagrams illustrating the operation of the feed members; 7

= Before proceeding to a" detailed description of the m'achine, a brief general description of its construction and mode of operation will be given. The machine comprises two pairs of feed members which engage the work in turn one pair after the other in such manner as to feed the work continuously. The upper member of one pair of feed members serves also as a fold-guide or creaser over an edge of which a moving folder bends the margin of the work to form the fold; and the upper member of the other pair of feed members serves also as a hammer or fold-presser to press the fold. The work, as it is fed through the machine, first encounters a gage against which the work is pressed and the margin of the work turned up as far as permitted by a limiting horizontal projection on the gage, which engages the edge of the upwardly turned margin, said upturned margin being held against the curved face of the gage by a cooperating finger. Next, the upwardly turned margin is slit or snipped, if desired, by a snipping knife which is normally inoperative but may be rendered operative when desired. The folder then bends the margin about the thin lower edge of the creaser, which, as has been explained, acts also as the upper one of one pair of feed members, to form the fold; and finally the fold-presser, which, as has been explained, acts also as the upper one of the other pair of feed members, presses the fold. A feed block beneath the work cooperates with the creaser, and an anvil, which is also beneath the work cooperates with the fold-presser. The gage and its cooperating finger, the folder and the knife all move forward and back in the line of feed of the work, the folder and the knife making their folding and their cutting movements respectively transversely of the line of feed while they are temporarily moving forward with the continuously moving work.

Referring now more particularly to Fig. 5, a piece of work I00, such as a part of the upper of a boot or shoe is shown in process of being operated upon. The work at the moment is being gripped and fed forward in the direction indicated by the arrow by the first pair of feed members, a block l9 beneath the work and a creaser 2| above the work. A portion 200 of the cementcoated margin of the work has been turned up by engagement with the upwardly-curved face of a gage 23, being held against the gage by a cooperating finger 25; and part of this upturned margin is about to be bent over the thin lower edge of the creaser 2| by the folder 2'! to form a fold. A part 300 of the margin has already been previously folded by the folder and pressed flat against an anvil 29, which forms the lower feed member of the other pair, by a hammer or foldpresser, not shown in this figure but shown at 3| in Fig. 2, which forms the upper feed member of the other pair. The knife 33 is in inoperative position above the work. The block I9, the creaser 2 I, the gage 23, the finger 25, the knife 33 and the folder 21 are all temporarily moving with the work. while the anvil 29 and the foldpresser 3|, which are in separated relation as shown in Fig. 3, are moving back preparatory to gripping the work and feeding it forward. The two pairs of feed members are always moving forward when they grip the work, and each pair grips the work while it is being moved forward by the other pair so that the work is fed continuously through the machine. The anvil 29 moves back and forth in a horizontal path, while the cooperating fold-presser 3| moves into and out of contact with the upper face of the work in a path which is a flattened ellipse. Of the other two feed members, the creaser 2| moves back and forth in a substantially horizontal path, while the block l9 moves into and out of contact with the under face of the work in a flattened elliptical path.

Referring now to Fig. 1 wherein the whole machine is shown in elevation from that side at which the operator sits, the frame of the machine comprises a base A adapted to rest upon a bench, a work-supporting or lower arm B in the outer end of which is located most of the mechanism for operating the feed-block, the folder and the anvil, and an upper, overhanging arm D at the outer end of which is located most of the mechanism for operating the gage, the creaser-foot, the knife and the hammer or fold-presser, said head having a. cover plate E which holds the moving parts of the mechanism in place and is fastened by screws F to the arm. The work-supporting arm B has fastened to it by screws, two of which are shown at G, a flat table H upon which the work I00 rests as it passes through the machine, said table having integral with it a housing I which encloses the mechanism at the outer end of the arm B and holds a, supply of oil which may be drained off, when desired, by removing a drain plug J.

Referring first to Fig. 3, the mounting and mode of actuating the hammer or fold-presser 3| will be described first. The upwardly extending stem of the fold-presser is fastened by a screw to a fiat face at the lower end of a rod 3'! which is vertically slidable through a bore in a lug 39, said lug being integral with the lower end of a swinging carrier 4|. Another lug 40 at the top of the carrier has a vertical bore in alinement with the bore in the lower lug 39 and has slidably mounted therein a rod 43 into the lower end of which the upper end of the rod 31 is threaded. The upper end of the carrier 4| is extended laterally to provide a hanger 4|a, shaped like a similar hanger 4|b (Fig. 2), and by which the carrier is pivotally supported on a pin 6| threaded at the top of the machine in the end of the arm D of the frame as is a similar pin 6 shown in Fig. 2. The end faces of the hangers Ma and 4|b abut the end face of the arm D. Threaded upon the upper reduced end of the rod 43 is an adjusting nut 45; and above that is a check-nut 41, there being a heavy compression spring 49 between the lower face of. the nut 45 and a shoulder on the rod 43. The rod 31 is prevented from rotating by means of a key 5| which engages a vertical slot in the lug 39. The fold-presser carrier 4| has mounted upon it a channeled slide 52 having a cover and a lateral lug 53 provided with a bore in alinement with the bores in the lugs 39 and 40 through which the rod 31 is also slidable. Between the lower face of this lug and a nut 55 on the rod 31 is a compression spring 51 the tension of which may be varied by turning the nut. The tension of this spring determines the force which is applied to the work by the fold-presser. Between the upper face of this lug 53 and the lower end of the rod 43 is a heavy compression spring 59 through which the fold-presser is raised in a manner presently to be described. The above described mounting of the carrier 4| provides for a swinging movement thereof about the stationary pivot pin 6|, thereby to move the fold-presser forward and back in the line of feed of the work; and the fold-presser is moved up and down by the lug 53 through the spring 59 as has been described. 'When "it is moved down,'the spring 51 is compressed more or less. The limit of downward movement of. the rod 3'! and the fold-presser is determined by the heavy spring 49 which acts as a stop so that, when there is no work in the machine, the fold-presser will not strike the anvil 29. The fold-presser can be adjusted up and down by turning the rod 43 down on to the upper end of the rod 3?; and this can be accomplished by turning the check-nut 41 after it has been screwed down hard against the adjusting nut 45. The swinging of the fold-presser about the pivot BI and its up-and-down movements are so timed that the fold-presser moves in -a generally elliptical path in which it descends upon the work, moves to the left with the anvil 29, and then rises and returns to initial position.

The upward and downward components of the movement of the fold-presser are produced as has been explained by the up-an'd-down movements of the slide 52 on the carrier 4|, the movements of the slide being caused by a crank pin 65 on the end of a rotary shaft 63. This crank pin extends into a bore 61 (fig. 4) in a block 69 in the form of a cross, the horizontal bar of which is received between two horizontal flanges 52a and 52m; (Fig. i) which project from the rear of the slide 52. Thus when the shaft 63 is rotated, the siide 52 is moved up and down. The driving shaft '93 and its pin 65 are shown clearly in Fig. 6 in spaced relation from the block 69. The lateral component of the movement of the fold-presser is caused by this same crank pin 65 as it acts also to swing a bell crank lever H (Fig. 6) about a fixed rod 13. This rod 13, which is headed at its outer end, has a cylindrical shank received in a bore in the frame D and held there by a set screw, such as the set screw 13a shown in Fig. 2 for a corresponding rod I3. The upright arm of the bell crank lever 1| has a round hole through its upper part and two segmental flanges 15 (Fig. l) projecting from the rim of the hole to receive a member 11 (Fig. 10), said member having a vertical groove 19 to receive slidably the upright bar of the cross 89, and a vertical slot 8| through which the crank pin 65 extends. Consequently, rotation of the shaft 63 and its crank pin 65 swings the bell crank lever H as has been stated. The lever II has a horizontal arm, extending to the right in Fig. 6, which has a bore to receive a pin 93 projecting from the upper end of a vertical link 85, the lower end of which has a pin 81. The bell crank H also has integral therewith, and extending to the left in Fig. 6, a knife actuator arm !86, the function of which will be later described. A link 89 having an elongated hub 89a pivoted on a normally fixed but adjustable pin 9| carries at its outer end a pivot pin 93; and the inner end or head of a link 97 has two elongated sockets to receive respectively the pin 87 on the link and the pin 93 on the link 89. This link 91 at its outer end carries a pin 99 which is received in a bore in the lower part of the carrier 4| as best shown in Fig. 3. The fixed but adjustable pivot pin 9| (Fig. 6) is carried by an arm lei fast to the outer end of a shaft I93 which may be turned to move the pin 9| into and hold it in various adjusted positions. Assuming that this pin 9| is held stationary in a position in which its axis does not coincide with the axis of the pin 99, rocking of the bell crank lever (I about the pivot pin 13 moves the link 35 through the pin 81 to the head of the link 97,

causes the latter to turn 'onthe' pin 93 carried by the swinging link 89 which rocks about the fixed pivot 9|. The rocking of the link 89 causes the link 91 to oscillate in a path determined by the location of the axis of the pin 9| so that the pin 99 moves laterally and imparts oscillation to the carrier 4| (Fig. 3) about its pivot 6|. If the axes of the pin 9| and the pin 99 .are in alinement, substantially no lateral oscillation will be imparted to the pin 99 and no oscillatory movement to the fold-presser carrier 4|; and the extent to which the carrier 4| is oscillated depends upon the position into which the pin 9| is adjusted by adjusting the shaft I93.

vAs has been stated above the creaser-foot, the combined gage and cutting block and the knife all move back and forth in the line of feed movement of the work. These parts are all carried directly or indirectly by a carrier 4| (Fig. 3) similar to the carrier 4|. A vertical rod I95, which as will be presently described carries the creaserfoot 2|, is vertically slidable in alined bores formed in lugs on the carrier 4|, being normally held down by a compression spring I01 located between the upper lug and a collar I09 adjustably fastened to the rod by a set-screw the downward movement or" the rod being limited by an adjusting nut H3 threaded upon the upper end of the rod. Vertically slidable on the carrier 4| is a channeled slide member 5 which is similar to the slide member 52 on the carrier 4|; but the slide member H5 has no lug in engagement with the rod I95 since it is not desired to impart any vertical movement of the slide member to said rod. The slide member 5 has rearwardly proje'cting spaced flanges ||5aa and ||5a (Figs. 2 and 4) which receive the horizontal bar of the cross 69'. The carrier 4| is swung about a fixed pivot 6 at the top of the machine, which corresponds to the pivot 6| of the other carrier, by a mechanism (shown partly exploded in Fig. 8) which is just like the mechanism shownin Fig. 6 for swinging the fold-presser carrier 4|, except that these two mechanisms are respectively a right-hand and a left-hand mechanism. It is believed to be unnecessary to describe in detail the mechanism shown in Fig. 8 for swinging the carrier 4| about its pivot. Each of the elements in this figure has been given the same reference numeral as the corresponding element in Fig. 6, but each has been marked with a prime. Rotation of the shaft 63 with its crank-pin 65 rocks the bell crank lever about the rod 13 and swings the horizontal arm of the bell crank lever up and down. This moves the vertical link 85' up and down, and rocks the link 91 about the swinging pin 93 on the link 89' which itself swings about the fixed but adjustable pivot 9|. This imparts a lateral movement to the link 91 so that the pin 99 oscillates the carrier 4| (Fig. 3) about its pivot 5|. Here again, the position in which the pivot pin 9| is .held determines the extent of oscillation of the carrier 4|.

The rod I05, which indirectly carries the creaser-foot 2!, passes down through a bore in a block (Figs. 3 and '7), being fastened to the block by a screw l9, said block having two arms |2| extending to the right, and spaced in the direction of the length of the frame arm D. One of these arms is shown in Fig. 3, and both of them are shown in Figs 2 and 7., said arms having mounted between their outer ends a roll I23. Extending down between one side (Fig. '7) of the block I I1 and the roll I23 is-a depending portion;

of the carrier 4| which is rectangular in crosssection, said portion serving as a guide when the block I I1 is raised or lowered in a manner which will presently be described. The lower portion of the block II1 has a horizontal cylindrical boss in which is rotatably mounted a short shaft I25. In the underside of the block and extending through the cylindrical boss is a slot to receive the hub of the creaser-foot 2|, said hub being bored to receive the small shaft I25 and being fastened thereto by a set screw I21. The creaserfoot is normally held in the position shown in .Figs. 2 and 7 by a spring-pressed pin I29 carried by a boss 2Ia at the. upper end of the creaser which swings the creaser as far about the axis of the small shaft I25 as is permitted by a stopscrew I3I which engages the lower end of the rod I05. In order to raise the creaser and swing it to the left, as viewed in Figs. 2 and '1, when desired, a small segmental arm I33 has its hub adjustably fastened to one end of the small shaft I25 by a pinch-screw I35, said arm being adapted to contact with a roll I36 which is carried by the downward extension of the carrier 4| so that, when the block I I1 is pushed up, the creaser-foot 2I will be moved up and swung out. In order to move the block II1 up, a small lever I31 pivoted at I39 to the frame has at its left-hand end a roll I9! which, when the right-hand end of the lever is pushed down, contacts with the underside of the roll I23 and pushes up the block II1. As the block moves up, the small shaft I25 is rocked and the creaser-foot is moved up and swung out to the left thus withdrawing it from the crease of the work without damage to the latter. By changing the angular position of the segmental arm I33 on the shaft I25, the creaserfoot may be either moved straight up or moved in the manner which has just been described, since no swinging of the creaser-foot will occur until the outer end of the arm I33 has engaged the roll I36.

The knife 33 (Fig. 6) is mounted for vibratory movement on the depending portion of the creaser-carrier 4|. The gage 23, the lower end of one face of which serves as a shear member in cooperation with the knife, is adjustably fastened to this depending portion by a screwbolt I43. The finger 25 (see also Fig. 6a) which cooperates with the gage, has a bent stem which is siotted at I41 adjustably to receive a bearing pin I44 which is rotatable in a bore in the extension of the carrier M. This pin has a reduced threaded end to receive a nut I45, said nut having a flattened hub which extends into the slot I41 in the stem of the finger 25. After the pin has been turned to loosen the nut, the finger may be adjusted horizontally. The gage 23 (Fig. 6) has an overhanging horizontal projection I5I the purpose of which is to limit the extent of the margin of the work which is turned up by the gage. The finger 25 has a flat horizontal face near its forward end which is held against a fiat face on the gage by a tension spring I49 connected to an offset inward extension 25a of the finger and to a plate (Fig. 2) on the frame. Returning now to Figs 6 and 9, the knife 33 is clamped to a block I51 having extending horizontally from it a short hollow shaft I59 which is rotatable in a horizontal bore in the extension of the carrier 4 I said shaft being held from longitudinai movement by a nut IBI and a checknut IE3 threaded on the outer end of this hollow shaft. The upper portion of the stem of the knife the latter is at the top of its stroke.

is received in a dovetailed slot in the block I51 and is clamped in place, as best shown in Fig 9, by the suitably shaped head I 65 of a small rod I95 which extends through the hollow shaft I59 and has threaded on its outer end a nut I61. Extending rearwardly from the block I51 is a pin I69 which is received in a socket in the head of a small T-shaped member "I, the substantially horizontal stem of which passes loosely through a socket formed in a hub at the lower end of a link I13, being held from longitudinal movement by a nut I15 threaded on the outer end of the stem of the member WI. The pin I69, the T- shaped member HI and the socket at the lower end of the link I13 form in effect a universal joint so that the knife may be moved back and forth in the line of feed with the carrier 4| without disturbing its connection with the link I13, through which the knife is vibrated when it is desired to snip the edge of the work. The upper end of the link I13 is pivoted at I11 to one end of a lever I19, the hub of which is rotatable on the rod 13, and the other end of which has a fork I'Ifia. The lever I19 has a vertical pin I8I about which is pivoted a second lever I83, the farther that the latch I is entirely received between the branches of the forked end I19a of the lever I19. The lever I33 is so held by the enlarged head of a push rod I81 which is connected to a treadle rod I89 (Fig. 1). The inner end of the push rod I31 is pivoted at IEII to the upper end of an arm I93 (Fig. 13) the hub of which is fast to a rockshaft I95. A second arm I95, like the arm I93, also has its hub fast to the rock-shaft and is pivotally connected at its outer end to the treadle rod I89. A tension spring I91, connected at one end to the pivot at the upper end of the arm I96 and at the other end to a pin I99 (Fig. 1) on the frame urges the push rod I81 continually to the left. Returning to Fig. 6, a compression spring 20I, located between the lever I19 and the lever I83, tends at all times to swing the lever I83 about the pivot I8I but is not effective until the push rod I81 is withdrawn. Even then it may not be effective instantaneously, depending upon the position of the vibrating actuator I86. The construction is such that the latch I85 on the end of the lever I83 is in alinement with the socket in the actuator only at the top of the stroke of said actuator. Consequently, when the treadle rod I89 is depressed to withdraw the push rod I81 so as to permit the latch I85 to become effective, said latch always moves into the slot in the actuator I86 when that member is reversing the direction of its movement at the top of its stroke and is thus momentarily stationary. A cylindrical stop pin 295a is slotted to receive a screw driver and is supported on an eccentrically placed shank which enters the frame D and is held in adjusted position by a set screw (Fig. 3). The forked end I19a of the lever I19 abuts this stop pin and may thus be located to bring the latch opposite the slot of the actuator I86 when A vertical rod 203 having its upper end slidable in a bore in a stationary pin 295 held in place in the frame by the headof a screw 261 has a hub at its lower end to receive the pin I11 and carries acompression spring 299 to hold the knife raised whenit is not being vibrated. With this construction, therefore, any selected portion of the edge of the work may be snipped by depressing the treadle (not shown) which is attached to the lower end sof the treadle rod I89 (Fig. l).

Referringto Fig. 2, the tail a of the finger 25 is urged upward by the spring I49 to hold a portion near the other end of the finger against a flat horizontal face on the gage 23. Thistail lies in the downward path of movementof a horizontal pin 2 I3 which is adjustably held in a horizontal slot in a small lever 2l5 (see also Fig. 7) one end of which is pivoted about the pin I39 and the other end of which extends beneath the creaserlifting lever I31. A stop-screw 2|1 threaded through the lever 255 contacts with the frame. Depressing the finger-piece at the outer end of the lever 2I5 raises the finger 25,'and depressing the finger-piece at the outer end of the lever I31 raises the finger 25 and also raises and swings outwardly the creaser 2|.

As .has been explained, the anvil 29 moves back and forth in a horizontal path in the line of feed movement of the work. The mechanism for producing this movement of the anvil is in principle the same as, and in construction quite similar to, that which actuates the creaser 2|. Referring to Fig. 12, the anvil 29 is fast to the top of a carrier 2| 9, said carrier being fastened by a set screw M8 to a horizontal slide rod 220 (Fig. 3) which extends through a bore 222 (Fig. 12) in the carrier, said carrier being held upright and steadied in its sliding movement by a fork at its lower end which fits over a block 22l and slides upon the block. This block (Fig. .14) and another block 22E just like it which, as will presently appear, is engaged by a fork on the lower end of the carrier of the feed-block l9, are loosely mounted respectively upon two hollow trunnions which project horizontally from the hub of a lever 465, later to be described, the hollow trunnions and the hub of the lever being rotatable on a horizontal rod 224 (Fig. 3) carried by the frame.

Referring again to Fig. 12, the carrier'2l9 has a socket to receive an actuating pin 223, corresponding to the pins 99 and .99 which oscillate respectively the fold-presser carrier 4.! and the creaser-carrier 4!, said pin 223 being actuated indirectly from a crank-pin 225 on a driven rotary shaft 221. An elongated hub of a link 229 receives the outer end of this crank-pin, the lower end of the link having a small pivot pin 242. This pin is received in a hollow pivot 23! formed .at one end of a link 24l, the other .end of which carries the pin 223. A link 233 has a hub at one end to receive the hollow pivot 23! and at the other a hub to receive a fixed but adjustable-pin 235 carried at the outer end of an arm 231 the inner end of which is fast .to a shaft 239. This shaft may be adjusted into various angular positions to change the position of the pin 235 and hold it stationary. If the pin 223 is inline with the fixed but adjustable pivot pin 235, rotationof the shaft 221 will not move the pin 223 bodily, and no movement will be imparted to the anvil '29. If, however, the pin 223 is not in line with the pivot pin 235, the pin 223 will be moved bodily and will move the anvil back and forth, the extent of this movement depending upon the positionin which the pivot pin 2351s held.

' The feed-block l9 (Fig. .3) which, with .the creaser, forms one pairof ifeed members, moves in an elliptical path substantially like that of the .fold-presser 3|, except that itengages the underside of the work while the fold-presser engages the upper side, Referringto Fig. 11, the block l9 has a stem the upper part of which is curved and the lower part of which is vertical and slidable in a vertical dove-tailed guideway in a carrier 243. This carrier has a horizontal bore 230 to receive the slide rod 220 (Fig. 3) and is slidable upon this red instead of being fastened .to the rod as is the anvil carrier. .At its lower end it has a fork which fits overand slides upon the block 22l (Fig. 2). A coiled compression spring 245 (Fig. 11), located between a lug on the carrier 243 and a lug on the stem of the block 1 9, encircles a pin-241 fast to the lug on the stem of the feed-block and slidable through a bore .in the lug'on .thecarrier. The spring 245 continually'urges the block l9 to move up-to an extent limited byanut-249 threaded on the-lower end of the pin 241. In order to move the'block 19 down atthe'proper times, a'pin 25! carried by the stemof the feed-block I9 is received between the horizontal branches of a fork at the outer end of a lever 253 having an elongated hub rotatable upon a horizontal pin 255 which projects eccentrically from one end of 'a-short shaft 251 rotatable in a bore in the frame B. This shaft has a slot 259 in one end to facilitate turning it and has a middle'portion ofreduced diameter to receive the thrust of a set screw (Fig. 4), which holds the shaft in adjusted angular position. Turning the shaft 251 changes the position of the pin 255 and thus permits the extent of up-and-down movement of the outer end of thelever, and consequently of the feed-block l9, .to be varied. .The lever 253 is pushed down at the proper'time by'an arm 263 the outer end of which engages a roll 264 carried by the lever.

This arm'isfast'to one endof a rock-shaft 265 which is rotatable ina bearing in the carrier 243. The other end is fast to one endof a bent .arm 261 having at'its other end a fork between the branches of whichrasquare block 269 is slidable, said block having a bore totreceive a small crankpin 21l formed on the outer end of a second crank-pin 213 which in turn is formed on the outer end of a third crank-pin 215 carried by:a rotary shaft 21:1. The first crank-pin 21! imparts 'to the feed-block IS the vertical component of of the movement of the feed-block I9 is imparted .toit by alink mechanism, including afixed but adjustable pivot 'which is similar to the three mechanisms described abovev for imparting lateral movement respectively to the fold-presser, to the creaser and to .the anvil. The fixed but adjustable pivot 219 is carried at the outer end of an arm 28 l ,the inner end of which is fast to the end of a shaft 283 (Figs. 2 and 13) which may be adjusted to move the pin 219 into and hold it in various adjusted positions. A link 284 hasat one end an elongated hub to receive the pin 213 and at the other end a pin 285 extending into a sleeve 281 integral with one endof a link 289, the other end of which has a pin 29| extending into a bore in a boss on the carrier243. A link 293 has a bore in one end to receive the sleeve 281 within which is the pin285 andat the other end a bore to receive the fixed but adjustable pivot 219. "If the last-named pivot and the pin 29! are in line, rotation of the shaft 211 will impart no movement to the carrier 243; but if they are out of line, as shown, rotation of the shaft 211 will move the pivot 29! bodily and impart back-'and-forth movement to the carrier 243, the extent of such movement depending upon the position in which the pin 219 is held.

Referring now to Figs. 14, 16 and 17, the mounting of the folder 21 and its actuating mechanism will be described. The folder is carried indirectly by a rectangular frame comprising two bars 353, the vertical face 35! of the bar 35! being held against a vertical face on the bar 353; and, through the forward ends of these bars (the left-hand ends as viewed in Figs. 14 and 17) passes a rod 355 on which the frame is pivoted for up-and-down swingingmovement. One end of the rod 355 has an eccentric trunnion 351 received in a bore in the frame and held in adjusted angular position by a set-screw 359 (Fig. 3). The other end has a second trunnion 39! concentric with the trunnion 351 and provided with a slot to receive a screwdriver. This trunnion 36! is also received in a bore in the frame. By inserting a screwdriver in the slot and turning the rod 355, the folder-carrying frame may be adjusted horizontally to position the folder properly in a direction transverse to the direction of feed movement of the work. Returning to Figs. 14 and 17, the right-hand ends of the bars 35!, 353 are bored to receive a shaft 363, and between these rear ends is a hub 365 fastened to the shaft and having pivotally connected to the bottom of it the upper end of a rod 391 which passes down through a bore in a block 369 and has nuts 31! threaded on its lower end, between the upper one of which and the block there is located a compression spring 313. The purpose of the spring is to permit the folder-carrying frame to rock upwardly about the rod 355 at any time when the folder 21 is brought down upon a thick locality of the work, for example upon a back seam. The rod 361 has a collar 315 fast to it and in contact with the top of the block 369. A small pin 311 rigid with the block 369 is fast to the outer end of a horizontal arm 319, the hub of this arm being rotatable on a stationary shaft 38!. Another arm 383, integral at its inner end with the same hub, carries at its outer end a pin 385 extending into an elongated bore in the lower end of a link 381, the upper end of which has a bore to receive the inner end of the crank-pin 225 on the shaft 221. It will be recalled that the anvil 29 (Fig. 12) is moved back and forth by movement of this same crank-pin 225. Returning now to Figs. 14 and 17, the rotation of the shaft 221, through the crank-pin 225, the link 381, the pin 385, the arms 383, 319, the block 369 and the vertical rod 361 will swing the foldercarrying frame up and down about the rod 355 and thus raise and lower the folder. This up and down motion moves the carrier bodily in a direction across the line of feed. The vertical hole in the block 369 is slightly larger than the diameter of the rod 361 to prevent these parts from binding.

The folder 21 is slidably and rotatably mounted on a small horizontal pin 389 (Fig. 17) carried by the middle portion of a bent link 39!. This pin 389 is parallel to the line of feed. The hub at one end of this link has fastened in it a small rock-shaft 393 rotatable in alined bores in the depending arms of a yoke-like link 395 (see also Fig. 16) the upper portion of which has at opposite ends alined trunnions 391 received in alined bores formed horizontally in the bars 35!, 353 of the folder-carrying frame. The hub at the other end of the link 39! has fast to it a small rockshaft 399, the ends of which are received in alined bores in a second yoke-like link 49! having at its upper part alined trunnions 493 which, like the trunnions 391 of the link 395, are also rotatable in alined bores in the folder-carrying frame. The yoke-like link 395 is rocked about its trunnions 391 by means of the previously mentioned lever 495 having projecting horizontally from both sides near its middle portion hollow trunnions 491, 499 rotatable in bores in the square blocks 22! 22! upon which the lower forked ends of the anvil carrier 2!9 (Fig. 12) and the feed-block carrier 243 (Fig. 11) are slidable. The forward end of the lever 495 has an elongated split hub in which is fastened by a pinch-screw 4! a rod 4i2 having eccentric trunnions 4i3 which project from both ends of the rod. Pivoted at their lower ends on these projecting trunnions are two links 4 5, 4 1, the upper ends of which are pivoted on alined horizontal pins M9, 42! carried by lugs which project in a generally horizontal direction from the yoke-like link 395. The rear end of the lever 495 has a bore to receive the small end of a horizontal pin 423 fastened to it by a nut 425, the larger end of the pin being rotatably received in a bore in the head 421 of a horizontally extending pin 429 (Fig. 2), the head being held. in place by a screw 43!. The pin 429 is slidable and rotatable in a horizontal socket in a hub 432 at the lower end of a link 433, the hub at the upper end of which has a bore to receive the crank-pin 215 on the end of the shaft 211. This crank-pin 215 is one of those shown in Fig. 11, the other two, 213, 21!, serving to operate certain mechanism for imparting movement to the feed-block !9. Referring again to Fig. 2, the right-hand end of the lever 495 has a curved face generated about the axis of the hollow trunnion 491, and this curved face engages a fiat vertical face on the left-hand end of the hub 432 so that the distance between this face and the axis of the trunnion remains always the same. The right-hand end of the hub 432 has a raised rim 434 which bears against a vertical face on the frame as the hub 432 moves up and down. Returning now to Fig. 14, rotation of the shaft 211 rocks the lever 495 about the alined axes of its trunnions 491, 499 and rocks the yoke-like link 395 back and forth on its trunnions 391. The bent link 39!, which carries the folder 21, is pivoted at one end to the yoke-like link 395, at a certain distance from the axis of the trunnion 391, and at the other end, at the same distance from the axis of the trunnion 493, to the yoke-like link 49! and consequently the pin 389 upon which the folder 21 is pivoted is moved bodily to and fro.

It has been explained that the folder-carrying frame is swung up and down about the axis of the rod 355 to raise and lower the folder and that the folder is also moved bodily in a curved path due to the mechanism which has just been described. In addition to these movements, the folder is rocked about the pin 389. To this end, the portion of the folder below the pivot 389 has a horizontal bore to receive a horizontal pin 435 integral with the upper end of a link 431, the lower end of this link having trunnions 436 (see also Fig. 2) which are received in alined bores in the yoke-like link 395 which are below the alined bores in which the trunnions of the link 39! are received. Thus when the yoke-like link 395 is swung back and'forth, since the lower endof the link 43! is'farther from the axis of movement of the link than the'lower forward end of the link 39 I, the folder is rocked about its pivot 389. The pin 435 extends through the link 39! for a purpose presently to be described, and hence there is provided in the link 39! a curved slot 439 to permit back-and-forth movement of the pin 435. This pin, which is integral with the link 431, has an elongated head 44! which engages the link 39! on the opposite side from the link 43? and keeps the upper end of the link 43'! from moving away from the link 39!, since such movement would cause the trunnions at the lower end of the link 43'! to bind in their sockets. The links 43! and 39! are assembled by holding the link 43'! in such a position that the head 44! may be passed through the slot 439 after which the link 43! may be swung into the position shown. By reason of the mechanism which has been described above the folder moves as indicated in Figs. 17 to 20.. The folder also moves back and forth in the line of feed, being slidable on its pivot pin 389. To this end a vertical slot (Fig. 14) in the depending portion of the folder 2! receives a thin generally segmental member 443 (Figs. 2 and 11) which is rigid with the carrier of the feed-block I9 and moves back and forth in the line of feed as has been described.

The four rotary shafts which impart movements to the work-engaging parts of the machine, as has been described above, are shown in section in Fig. 15. The shaft 63 moves the fold-presser in a generally elliptical path and also vibrates the knife about its pivot when it is connected with the knife. The shaft 63' movesthe creaser, the knife, the gage, and its cooperating finger back and forth in the line of feed. The shaft 22! moves the anvil back and forth and also moves the folder-carrying frame up and down. The

shaft 21?. moves the feed-block in an elliptical path, moves the link 39I upon which the folder is mounted, rocks the folder about its pivot and moves the folder back and forth in the line of feed.

These four shafts are driven respectively by four shafts, 445, 441, 449 and 45!. The shaft 445 has at its forward end a thick disk 453 provided with a groove 455 extending diametrically across its face to receive a rectangular slide-block 45'! into which extends a pin 459 carried by an arm 46! having .a split hub to receive the shaft 53, said shaft being fastened firmly to the hub by a key 463 and a pinch-screw 455. The rearportion of the shaft 445 has fast to it a small gear 46! which meshes with a large master-gear 459 on a countershaft 41!, said large gear being driven by a small gear 413 on the shaft 45.! which is the driving shaft of the machine and is rotated continuously from any suitable source of power by means of a belt 415 (Fig. 1).. The shaft 441 is driven from the large gear 469 bymeans of a small gear 41'! on said shaft; ,and similarly the shaft 449 has a small gear 419-which meshes with the large gear 469. The mechanisms which respectively connect the shaft 44! to the shaft 63, the shaft 45! to the shaft 21'! and the shaft 449 to the shaft 22! are all like the mechanism, described above, which connects the shaft 445 to the shaft 63; and consequently, these other three mechanisms will not be described in detail.

It has been explained above that the extent of the lateral movement of the fold-presser carrier depends upon the angular position into which the shaft I03 (Fig. 6) which carries the fixed pivot pin 9| is adjusted, that the extent of the lateral movement of the creaser-carrier depends upon the angular position into which the shaft I93 (Fig. 8) is adjusted, that the extent of the lateral movement of the anvil-carrier depends upon the angular position in which the shaft 239 (Fig. 12) is adjusted, and that the extent of the lateral movement of the feed-block carrier depends upon the angular position in which the shaft 283 (Fig. 11) is adjusted. When these four shafts are adjusted, it is necessary that they should be adjusted simultaneously and to the same extent.

Referring to Fig. 13, wherein the rear ends of these four adjusting shafts are shown, the shaft I 03 has fast to its rear end a segmental gear 48! which meshes with a similar segmental gear 483 fast to the rear end of the shaft I33. The gear 483 is formedat one end of a lever 435 pivoted at the other end at 48'! to th lower end of a link 489, the upper end of which is pivoted at 49! to the outer end of an arm 4-93 the hub of which is fast to a rock-shaft 495. Fast also to this rock-shaft is the hub of a lever 491, the outer end of which is pivoted at 499 to the outer end of-a short arm 50! the other end of'which has integral with it a collar 555 adjustably fastened by a set-screw 503 to a vertical treadlerod 50'! which passes up through a hole in a portion of the frame and has at its upper end a stop-nut 509 and a check-nut 5| I. The adjustable shafts 239,283 carry respectively segmental gears 5!3, 5I5 which, like thesegmental gears 38!, 483 mesh with each other. The rear end of the shaft 239 has adjustably fastened to it by a set-screw 557 the hub of an arm 5I9, the outer end of which is pivoted at 52! to one end of an arm 523 the other end-of which has integral with it a collar 52! adjustably fastened by a setscrew 525, to the treadle-rod 50?. The lower end of the treadle-rod 591 is connected to the usual treadle, not shown, held up by the usual spring, also not shown, as is the lower end of the treadlerod I89 of the knife-operating mechanism. The upward movement of the treadle-rod 59'! is limited by a stop-screw 529 threaded through a part of the frame and having upon it a check- When the treadle-rod is at its uppermost position, as shown in the figure, the four adjusting shaftsIOS, I93, 239 and 233 are holding their respective pivot pins in positions to produce a minimum feed of the work; and when the treadle-rod is depressed the feed is increased until a maximum is reached at the time the stopnut 569 strikes the frame.

ofthe work has been drawn tight and bent over upon the creaser. It then moves upward and to the right to the position shown in Fig. 19.

In so doing it rocks backward to cause the corner 535 to rub against the work in the locality of the fold line 200 thus pressing this portion of the work against the thin edge of the creaser.

It is this corner which is the last portion of the folder to engage the work, and consequently the release of the work is abrupt so as not to interfere with the continuous feed. From the position shown in Fig. 19, the folder moves downward and to the right and rocks backward into -1 the position shown in Fig. 20 after which it moves downward to the left and then upward to the left and rocks forward once more into the position shown in Fig. 17, It will thus be noted that the folder approaches the work in a given path and moves away from the work in a path which is not a reversal of its path of approach but is quite a different path designed to cause the folder to engage the work at the last movement over a small locality and to free the work instantly so as to facilitate the continuous feed of the work.

If no up-and-down swinging movement about the rod 355 (Figs. 2 and 17) was imparted to the folder-carrying frame, the folder would merely rock about a fixed axis 531 which would be located a distance from the axis of the moving pivot 389 equal to the distance between the axis of the trunnions 391 of the link 395 and the axis of the rock-shaft 393. Any point on the edge of the folder would then be moved back and forth laterally in an are centered on 531. Owing, however, to the swinging of the foldercarrying frame about the rod 355, this axis is moved up and down, with the result that a point on the axis 539 about which the folder swings at any given moment is moved in an orbital path indicated by the small dots 54| in a clockwise direction as indicated by the small arrows. The axis 539 is parallel to the line of feed and the orbital path lies in a plane at an angle to the edge of the work. Thus the combination of the up-and-down movement and the rocking movement of the folder causes the folder to move in the manner which has been described above. Although a folder mounted for swinging movement about a pivot pin which is itself moved during the swinging of the folder to cause the folder to move in a particular path has been shown and described, it should be understood that a folder of this general type is not limited to the particular path which has been shown and described nor to use with machines in which the work is fed continuously.

Referring to Figs. 21 and 22, the manner in which the fold-presser and the feed-block respectively engage and disengage the work to feed it continuously will be described. In Fig. 21 the shaft 63 which imparts movement to the foldpresser and the driving shaft 445 for the shaft 63 are shown as part of a diagram. The driving shaft 445 is at all times out of line with the shaft 53, being here shown at a predetermined distance below it. Every time the driving shaft 445 rotates through that 180 of its revolution in which the crank-pin 459 (Fig. 15) is above the line 603, the shaft 63 rotates through a greater distance, namely through 180 plus the sum of the two angles included respectively between the lines GUI and 505 and between the lines GUI and 501. Assuming that these two angles are each 20 the shaft 63 rotates through 220, and the fold-presser is moved a distance which is proportional to the distance from the point P to the point R along the circle 600 in the direction of the arrow. And every time the driving shaft 445 rotates through the 180 in which said crank-pin is below the line 603, the shaft 63 rotates through and the foldpresser is moved a distance which is proportional to the distance from the point R to the point P along the circle 600. While the fold-presser is moving, so to speak, from the point R to the point P, it feeds the work; and, while it is moving from the point P to the point R, it is out of engagement with the work. Disregarding, for

the present, the increase and decrease in the angular velocity of the shaft 63 due to the manner in which it is driven, the fold-presser has a slow feed movement and a quick return. The fold-presser may thus be considered to engage the work at the point R, to release it at the point P, and to move out of engagement with the work back to the point R. The fold-presser moves forward and back once for each rotation of the shaft 63, and consequently its velocity is zero at two of the angular positions of this shaft. Assuming now that the upper half of the circle represents the backward movement of the foldpresser and that the lower half represents the forward movement, the two points where the line 50| intersects the circle are the points where the movement of the fold-presser is reversed. The location of these points depends, of course, upon the relative positions of the crank-pin 459 (Fig. 5) on the rear of the shaft 63 by which it is driven and the crank-pin 65 (Fig. 6) at the front end of the shaft by which said shaft imparts motion to the fold-presser. From this it will appear that the velocity of the fold-presser is increasing at the point R where it engages the work and is decreasing at the point P where it releases the work.

Referring now to Fig. 22, wherein the shaft 211, which imparts movement to the feed-block and the shaft 45| which drives the shaft 211 are shown, these two shafts are the same distance apart as are the shafts 53, 445; and the feedblock engages the work at the point S while its velocity is increasing and releases the work at the point T while its velocity is decreasing. The timing of the rotation of the shafts 63 and 211, however, is such that the fold-presser, moving at decreasing velocity, is releasing the work at the point P when the feed-block, moving at increasing velocity, is engaging the work at the point S. On the other hand, the feed-block, moving at decreasing velocity, is releasing the work at the point T when the fold-presser, moving at increasing velocity, is engaging it at the point R. The work is then fed continuously but not at a uniform rate of speed.

It has been stated that the cover plate E (Fig. 2) holds in place certain mechanism which is located in the outer end of the overhanging arm D. Referring first to Fig. 3, the creaser foot 2| is mounted in the carrier 4| which has a bore in the hanger 4|b at its upper end to receive and slip over the pivot pin 6| secured in the outer end of the overhanging arm D and which has at its lower end a second bore to receive the actuating pin 99' by the bodily swinging movement of which the creaser carrier is swung back and forth about the pivot 6|. In Fig. 3, the cover plate E, which, being normally held against movement in the direction of the axes of these pins, holds the carrier 4| thereon, has been removed; and the carrier may be removed from the machine by merely sliding it off the two pins. These two pins are in telescoping relation respectively with the two bores in the creaser carrier 4| when the carrier is in place in the machine and are held in this relation by the cover plate E which contacts with the outer flat faces of two bosses M and N formed on the creaser carrier and shown in Fig. 2. Referring now to Fig. 8, wherein the operating mechanism for the creaser carrier 4| is shown with certain parts in spaced relation, this mechanism comprises among other elements the link 91' which carries the actuating pin 99'; and this link has two bores to receive respectively the pin 93 and the pin 81'. In order tomaintainthe link 9] in telescoping relation with the pins 81', 93', the rear face of the creaser carrier 4| contacts with the outer face of the link 91. as shown in Fig. 2. ,It may also be noted that therear face of the slide H (Fig. 2) on' thetcreaser carrier abuts the outer face of the horizontal bar of the cross 69 which is horizontally slidable between flanges 5a and Sara formed on the rear of the slide. This horizontal bar isshown again in Fig. 8. Thus the cover plate E holds the creaser carrier 4 l in telescoping relation with the pivot pin 6 l and the actuating pin 99', and through the creaser carrier holds the link 91' in telescoping relation with the pins 81', 93'. It also acts through the creaser carrier 4| and the slide H5 to hold the cross 69' in placebetween the flanges formed on the back of the slide.

The construction of the hammer carrier 4| is identical with that of the creaser carrier so far as this discussion is concerned. Referring to Fig. 3 the hammer carrier has a bore at its upper end to receive a pivot pin 6| and another bore at its lower end to receive the actuating pin 99 and is held in place on'said pins by the cover plate E which contacts with flat faces formed on bosses P, Q which are integral respectively with the upper and the lower portions of the hammer carrier 41. Referring to Fig. 6 which shows the hammer operating mechanism with certain parts in spaced relation, the rear face of the hammer carrier abuts against the outer face of the link 91 to hold that link in telescoping relation with two pins on the link 85; and. the rear face of the slide 52 (Fig. 3) on the hammer carrier 41 abuts against the block 69 which is received between horizontal flanges 52a and 52am (Figs. 2 and 4) on the back of the slide. When, therefore, the cover platevhas been removed, as shown in Fig. 3, the operator may remove both the creaser carrier 4 I and the hammer carrier 4! by sliding them off their respective pins; and after these members have been removed, he can remove various of the links shown in Figs. 6 and 8 by sliding them off the pins upon which they are mounted; There is thus provided a construction by which, after thecover plate E has been removed, various parts of the operating mechanism of the machine may very readily be removed and replaced.

Although the. invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described having, in combination, means for feeding the work continuously, a folder, means for moving the folder across the line of feed movement of the edge of the work to form a fold in the margin of the moving Work, and means for pressing the fold.

2. A machine of the class described having, in combination, means for feeding the work continuously, a folder, means for rocking the folder to form a fold in the margin of the moving work, and means for pressing the fold.

A machine of the class described having, in combination, meansforfeeding the work continuously and for pressing the fold, a folder for formingsthafold, and means for causing the folder to moveintermittently in the direction of feed movementof the work, and, during these intermittent movements, to move also in a direction at an angle to the direction of feed movement of the work.

4. A machine of the class described having, in combination, two feed members, means for causing said members to act in turn one after the otherin such manner as to feed the work continuously,,,.a folder, and means for moving the folder to form a fold inthe margin of the work, one of said feed members acting as a fold presser.

5. A machine of the class described having, in

combination, two feed members, means for movingsaid members in separate closed paths the planes of which are parallel to the direction of feed movement of the work and for causing said members to act in turn one after the other to feed the work continuously, and a folder for forming a fold in the moving work, one of said members acting as a fold-presser.

. 6. A machine of the class described having, in combination, two feed members, means for causing said members to act in turn one after the other to feed the work, a folder, and means for moving the folder back and forth in the line of feed as well as in a path across the line of feed movement of the edge of the work, one of the feed members acting to press the fold formed by the folder.

7. A machine of. the class described having, in combination, two feed members, means for causing said members to act in turn one after the. other to feed the work continuously, a folder, and means for moving the folder back and forth in the line of feed as well as across the line of feed, one of the feed members acting to press the fold formed by the folder.

8. A machine of the class described having, in combination, two pairs of feed members one member of each pair engaging one side of the Work and the other member engaging the other side, means for causing the two pairs to move in turn one pair after the other to feed the work, and a folder for forming a fold in the margin of the work, one pair of feed members comprising a fold-presser.

9. A machine of the class described having, in combination, two pairs of feed members, means for causing the two pairs to act in turn one pair after the other to feed the work, and a folder for forming a fold in the margin of the work, one pair of feed members comprising a creaser over the edge of which the margin of the work is bent by the folder, and the other pairv comprising a fold-presser.

10. A machine of the class described having, in combination, two pairs of feed members, one member of each pair engaging one side of the Work and the other member the other side, means for causing the two pairs to act in turn one after the other to feed the work continuously, a folder, and means for moving the folder back and forth in a path substantially parallel tothe direction of feed movement of the work and for also moving the folder across the line of feed movement of the edge of the work to form a fold, one pair of feed members comprising a fold-presser.

11. A machine of the class described having, in combination, two pairs of feed members, means for causing the two pairs to act in turn one after the other to feed the work continuously, a folder, and means for moving the folder back and forth in a path substantially parallel to the direction of feed movement of the work and for also moving the folder across the line'of feed movement to form a fold, one pair of feed members comprising a creaser about the edge of which the margin of thewo'rk is bent by the folder, and the other pair comprising a fold-presser.

12. A machine of the class described having, in combination, means for feeding the work and pressing the fold, a folder for forming the fold, a carrier for the folder with respect to which the folder is movable, means for moving the folder with respect to the carrier, and means for moving the carrier up and down with respect to the plane in which the work is fed.

' 13. A machine of the class described having,

in combination, means for feeding the work and pressing the fold, a folder for forming the fold, said folder being angularly movable, and means for causing the axis about which the folder is thus movable to move up and down with respect to the plane in which the work is fed.

14. A machine of the class described having, in combination, means for feeding the work and pressing the fold, a folder for forming the fold, said folder being angularly movable, and means for causing a point on the axis about which the folder is thus movable to travel in an orbital path lying in a plane at an angle to the edge of the work.

15. A machine of the class described having,

in combination, means for feeding the work and for pressing the fold, a creaser to determine the line of fold, a cooperating folder for forming the fold by bending the margin of the work over the creaser, a carrier for the folder with respect to which the folder is angularly movable,

means for causing the axis of angular movement of the folder to move in a predetermined path, and means for imparting angular movement to the folder.

16. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a creaser to determine the line of fold, a cooperating folder for forming the fold, a carrier for the folder with respect to which the folder is angularly movable, means for causing the axis of angular movement of the folder to move in an orbital path, and means for imparting angular movement to the folder.

1?. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a folder, a carrier upon which the folder is angularly movable, and means for imparting bodily movement to the carrier in a direction across the line of feed and for imparting angular movement to the folder.

18. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a folder, a carrier upon which the folder is angularly movable about an axis substantially parallel to the line of feed, and means for imparting bodily movement to the carrier to shift the axis, for imparting angular movement to the folder and for moving the folder back and forth in a path substantially parallel to the direction of feed movement of the work.

19. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a folder, a carrier upon which the folder is pivoted, and means for raising and lowering the carrier and for swinging the folder about the pivot.

20. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a folder, a carrier upon which the folder is pivoted, and means for raising and lowering the carrier, for swinging the folder about the pivot and for moving the folder back and forth along the line of feed.

21. A machine of the class described having, in combination, a work support, means for feed ing the work over said support and for pressing the fold, a folder, a carrier upon which the folder is pivoted, a frame upon which the carrier is movably mounted, and means for raising and lowering the frame thereby to vary the path of movement of the folder with respect to the work support, for moving the carrier with respect to the frame and for rocking the folder about its pivot.

22. A machine of the class described having, in combination, means for feeding the work and for pressing the fold, a folder, a carrier upon which the folder is pivoted, a frame upon which the carrier is movably mounted, and means for raising and lowering the frame, for moving the carrier with respect to the frame, for rocking the folder about its pivot and for moving the folder back and forth longitudinally of the axis of its pivot.

23. A machine of the class described having, in combination, a gage for bending up the margin of a piece of work fed past it, a folder, means for moving the folder to increase the bend in the margin to form a fold, a snipping cutter located between the gage and the folder, and two members acting in turn one after the other to feed the work.

24. A machine of the class described having, in combination, a gage for bending up the margin of a piece of work fed past it, a folder, means for moving the folder to increase the bend in the margin to form a fold, a snipping cutter located between the gage and the folder, and two members acting in turn one after the other to feed the work, one of saidmembers acting also to press the fold.

25. A machine of the class described having. in combination, a gage for bending up the margin of a piece of work fed past it, said gage having at its forward end considered in the direction of feed movement of the work a substantially flat face extending at an angle to said direction, a snipping cutter adjacent to said face for snipping the bent-up margin, a folder located forwardly of the cutter, means for operating said folder to increase the bend of the margin to form a fold, and two members acting in turn one after the other to feed the work, one of said members acting also to press the fold.

26. A machine of the class described having, in combination, means for feeding the work, for forming a fold in the margin thereof and for pressing the fold, and means moving intermittently with the work for snipping the margin thereof while the work is moving forward.

27. A machine of the class described having, in combination, means for feeding the work continuously, for forming a fold in the margin thereof and for pressing the fold, and means moving intermittently with the work for snipping the margin thereof during such movement.

28. A machine of the class described having, in combination, means for feeding the work, for forming a fold in the margin thereof nd for pressing the fold, a snipping cutter, and means for moving the cutter intermittently with the moving work and for operating the cutter to snip the margin of the work during these intermittent movements.

' 29. A'machine of the class described having, in t combination, work-feeding, work-guiding, foldforming and fold-pressing instrumentalities, a snipping cutter movable intermittently in the direction of feed movement of the work, and

h means for operating said cutter during said intermittent forward movements to snip the margin of the work.

30. A machine of the class described having, in combination, means for feeding the work continuously for forming a fold in the margin thereof and for pressing the fold, a cutter, and means for operating the cutter to snip the margin of the moving work.

31.A machine of the class described having, in combination, two feed members, means for causing said members to act in turn one after the other to feed the work continuously, a cutter, means for operating the cutter to snip the margin of the moving work, and a folder, one of said feed members acting as a fold-presser.

32. A machine of the class described having, in combination, two feed members, means for causing said members to act in turn one after the other to feed the work continuously, a cutter, means for moving the cutter back and forth in a path substantially parallel to the direction of feed movement of the work and in a path at an angle to said direction, and a folder, one of said members acting as a fold-presser.

33. A machine of the class described having, in combination, means for feeding the work, for forming a fold in the margin thereof and for pressing the fold, a snipping cutter, a carrier therefor upon which the cutter is movably mounted, means 'for moving the carrier intermittently in a forward direction with the moving work, an actuator normally disconnected from the cutter-carrier, and means under the control of the operator for connecting theactuator with the cutter-carrier to cause the cutter to snip the margin of the moving work.

34. A machine of the class described having, in combination, means for feeding the work, means for guiding the work and for forming a fold in the margin thereof, means for moving the guiding and fold-forming means back and forth along the line of feed, and means for pressing the fold.

35. A machine of the class described having, in combination, means for feeding the work, a gage forfacilitating the guiding of the Work, a folder' for forming a fold in the margin of the work, means for moving the gage and folder back and forth in the line of feed, and means for pressing the fold.

36. A machine of the class described having, in combination, means for feeding the work, a gage for facilitating the guiding of the work, a folder, means for moving the folder transversely of the direction of feed movement to form a fold in the margin of the work, means for moving the gage and folder back and forth in the line of feed, and means for pressing the fold.

37. A machine of'the class described having, in combination, means for feeding the work continuously, a gage for facilitating the guiding of the work, a folder for forming a fold in the margin of the work, means for moving the gage and folder back and forth in the line of feed, and means for pressing the fold.

38. A machine of the class described having, in combination, means for feeding the work continuously, a gage for facilitating the guiding of the work, a folder, means for moving the folder transversely of the direction of feed movement to form a fold in the margin of the work, means for moving the gage and folder back and forth in the line of feed,- and means for pressing thefold.

39. A machine of the class described having, in combination, means for feeding the work, a gage for bending up the margin of the Work, a folder for increasing the bend to form a fold, means for pressing the fold, and means for moving the gage and the folder back and forth in paths substantially parallel to the direction of feed movement of the work.

40. A machine of the class described having, in combination, means for feeding the work continuously, a gage for bending up the margin of the work, a folder for increasing the bend to form a fold, means for pressing the fold, and means for moving the gage and the folder back and forth in paths substantially parallel to the direction'of feed movement of the work.

41. A machine of the class described having, in combination, means for feeding the work, a gage for bending up the margin of the work, a folder, means for moving the folder in a path at an angle to the direction of feed movement of the work for increasing the bend to form a fold, means for pressing the fold, and means for moving the gage and the folder back and forth in paths substantially parallel to the direction of feed movement of the work.

42. A machine of the class described having, in combination, means for feeding the work continuously, a gage for bending up the margin of the work, a folder, means for moving the folder in a path at an angle to the direction of feed movement of the work for increasing the bend to form a fold, means for pressing the fold, and means for moving the gage and the folder back and. forth in paths substantially parallel to the direction of feed movement of the work.

43. A machine of the class described having, in combination, means for feeding the work, a combined gage and shear member for engaging and bending up the margin of the work, a cutter, means for causing the cutter to cooperate with the gage and shear member to snip the margin of the work, means for moving the cutter and the combined member back and forth in paths substantially parallel to the direction of feed movement of the work, a folder for forming a fold in the snipped margin, and means for the fold.

44. A machine of the class described having, in combination, means for feeding the work continuously, a combined gage and shear member for engaging and bending up the margin of the work, a cutter, means for causing the cutter to cooperate with the gage and shear member to snip the margin of the work, means for moving the cutter and the combined member back and forth in paths substantially parallel to the direction of feed movement of the work, a folder for forming a fold in the snipped margin, and means for pressing the fold.

45. A machine of the class described having, in combination, means for feeding the Work, a combined gage and shear member for engaging and bending up the margin of the work, a cutter, means for causing the cutter to cooperate .with the gage and shear member to snip the margin of the work, means for moving the cutter and the combined member back and forth in paths substantially parallel to thedirection of feed movepressing ment of the work, a folder, means for moving the folder in a path at an angle to the direction of feed movement of the work to form a fold in the snipped margin, and means for pressing the fold.

46. A machine of the class described having, in combination, means for feeding the work continuously, a combined gage and shear member for engaging and bending up the margin of the work, a cutter, means for causing the cutter to cooperate with the gage and shear member to snip the margin of the work, means for moving the cutter and the combined member back and forth in paths substantially parallel to the direction of feed movement of the work, a folder, means for moving the folder in a path at an angle to the direction of feed movement of the work to form a fold in the snipped margin, and means for pressing the fold.

47. A machine of the class described having, in combination, means for feeding the work, a cutter for snipping the margin of the work, a folder for forming a fold in the snipped margin, means for moving the cutter and the folder forward intermittently with the work during the folding and cutting operations, and means for pressing the fold.

48. A machine of the class described having, in combination, means for feeding the work continuously, a cutter for snipping the margin of the Work, a folder for forming a fold in the snipped margin, means for moving the cutter and the folder forward intermittently with the work during the folding and cutting operations, and means for pressing the fold.

49. A machine of the class described having, in combination, means for feeding the work, a gage for facilitating the guiding of the work, a cutter for snipping the margin of the work, a folder for forming a fold in the snipped margin, means for moving said gage, cutter and folder forward and back in paths substantially parallel to the direction of feed movement of the Work, and means for pressing the fold.

50. A machine of the class described having, in combination, means for feeding the work continuously, a gage for facilitating the guiding of the work, a cutter for snipping the margin of the work, a folder for forming a fold in the snipped margin, means for moving said gage, cutter and folder forward and back in paths substantially parallel to the direction of feed movement of the work, and means for pressing the fold.

51. A machine of the class described having, in combination, means for feeding the work, a gage for engaging and bending up the margin of the work, a cutter for snipping the bent-up margin, a folder for forming a fold in the snipped margin, means for moving said gage, cutter and folder back and forth in paths substantially parallel to the direction of feed movement of the work, and means for pressing the fold.

52. A machine of the class described having, in combination, means for feeding the work continuously, a gage for engaging and bending up the margin of the work, a cutter for snipping the bent-up margin, a folder for forming a fold in the snipped margin, means for moving said gage, cutter and folder back and forth in paths substantially parallel to the direction of feed movement of the work, and means for pressing the fold.

53. A machine of the class described having, in combination, means for feeding the work, a gage for engaging and bending up the margin of the work, a cutter for snipping the bent-up margin,

a folder movable in a path at an angle to the direction of feed movement of the work for forming a fold in the snipped margin, means for moving said gage, cutter and folder back and forth in paths substantially parallel to the direction of feed movement of the work, and means for pressing the fold.

5a. A machine of the class described having, in combination, means for feeding the work continuously, a gage for engaging and bending up the margin of the work, a cutter for snipping the bent-up margin, a folder movable in a path at an angle to the direction of feed movement of the work for forming a fold in the snipped margin, means for moving said gage, cutter and folder back and forth in paths substantially parallel to the direction of feed movement of the work, and means for pressing the fold.

55. A machine of the class described having, in combination, a folder for forming a fold in the margin of a piece of work fed past it, two pairs of feed members, four mechanisms for operating the members, one member of one pair serving as a creaser and one member of the other pair as a fold-presser, and means for adjusting the four mechanisms simultaneously to vary the rate of feed of the work.

56. A machine of the class described having, in combination, a folder for forming a fold in a piece of work fed past it, two pairs of feed members, four mechanisms for operating the members to engage the work in turn one pair after the other and feed it, one member of one pair serving as a fold-presser and one member of the other pair serving as a creaser, four adjusting shafts, one for each mechanism, and means for adjusting the four shafts simultaneously to vary the rate of feed of the work.

57. A machine of the class described having, in combination, a folder for forming a fold in a piece of work fed past it, two pairs of feed members, four mechanisms for operating the members to engage the work in turn one pair after the other and feed it continuously, one member of one pair serving as a fold-presser and one member of the other pair serving as a creaser, four adjusting shafts, one for each mechanism, and means for adjusting the four shafts simultaneously to vary the rate of feed of the work.

58. A machine of the class described having, in

combination, two feed members adapted to engage and release the work in turn one after the other to feed it, means for causing each member to move at increasing velocity as it engages the work, and the other member to move at decreasing velocity as it releases the work, said engagement and release being timed to cause the work to be fed continuously, and means for folding the margin of the work thus fed.

59. A machine of the class described having, in combination, means including two feed members adapted to engage and release the work in turn one after the other to feed it, means for moving each member in a closed path at a velocity which is increasing in some portions of the path'and decreasing in others, means for causing each member to engage the work while the velocity of said member is increasing, means for causing the other member to release the work at substantially the same time while the velocity of said other member is decreasing whereby the work is fed continuously, and means for folding the margin of the work thus fed.

60. A machine of the class described having, in combination. means for feeding the work con- 

